Topping up engine oil
WARNING Danger of burns when opening the bonnet
If you open the engine bonnet when the engine has overheated or during a fire in the engine compartment, you could come into contact with hot gases or other escaping operating fluids.
Before opening the bonnet, allow the engine to cool down.
In the event of a fire in the engine compartment, keep the engine bonnet closed and call the fire service.
WARNING Risk of injury due to moving parts
Certain components in the engine compartment may continue to move or suddenly move again even after the ignition has been switched off, e.g. the cooler fan.
Make sure of the following before performing tasks in the engine compartment:
Switch the ignition off.
Never touch the danger zone surrounding moving component parts, e.g. the rotation area of the fan.
Remove jewellery and watches.
Keep items of clothing and hair away from moving parts.
WARNING Risk of burns from hot component parts in the engine compartment
Certain components in the engine compartment can be very hot, e.g. the engine, the radiator and parts of the exhaust system.
Allow the engine to cool down and only touch component parts described in the following.
WARNING Risk of fire and injury from engine oil
If engine oil comes into contact with hot component parts in the engine compartment, it may ignite.
Make sure that no engine oil is spilled next to the filler opening.
Allow the engine to cool off and thoroughly clean the engine oil from component parts before starting the vehicle.
NOTE Engine damage caused by an incorrect oil filter, incorrect oil or additives
Do not use engine oils or oil filters which do not correspond to the specifications explicitly prescribed for the service intervals.
Do not alter the engine oil or oil filter in order to achieve longer change intervals than prescribed.
Do not use additives.
Follow the instructions in the service interval display regarding the oil change.
NOTE Damage caused by topping up too much engine oil
Too much engine oil can damage the engine or the catalytic converter.
Have excess engine oil removed at a qualified specialist workshop.
Turn cap 
anti-clockwise and remove it.
anti-clockwise and remove it. Top up the engine oil.
Replace cap and turn it clockwise as far as it will go.
and turn it clockwise as far as it will go. Check the oil level again More.